57220694784 has 432 divisors, whose sum is σ = 192079749120. Its totient is φ = 16772659200.

The previous prime is 57220694761. The next prime is 57220694801. The reversal of 57220694784 is 48749602275.

57220694784 is a `hidden beast` number, since 572 + 2 + 0 + 69 + 4 + 7 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 57220694784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25925809 + ... + 25928015.

Almost surely, 2^57220694784 is an apocalyptic number.

57220694784 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57220694784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96039874560).

57220694784 is an abundant number, since it is smaller than the sum of its proper divisors (134859054336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57220694784 is a wasteful number, since it uses less digits than its factorization.

57220694784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2254 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 57220694784 in words is "fifty-seven billion, two hundred twenty million, six hundred ninety-four thousand, seven hundred eighty-four".